yield   EC ECf
 59.5  1.6   A
 53.3  1.6   A
 56.8  1.6   A
 63.1  1.6   A
 58.7  1.6   A
 55.2  3.8   B
 59.1  3.8   B
 52.8  3.8   B
 54.5  3.8   B
 51.7  6.0   C
 48.8  6.0   C
 53.9  6.0   C
 49.0  6.0   C
 44.6 10.2   D
 48.5 10.2   D
 41.0 10.2   D
 47.3 10.2   D
 46.1 10.2   D